Fluoride single-crystal material for thermoluminescence dosimeter, and thermoluminescence dosimeter

Abstract

The present invention provides a fluoride single-crystal material for use in a thermoluminescence dosimeter, which material exhibits a thermoluminescence efficiency higher than that of conventional similar materials, and a thermoluminescence dosimeter employing the material. The fluoride single-crystal material for use in a thermoluminescence dosimeter contains a compound represented by LiXAlF 6 , wherein X is selected from the group consisting of Ca, Sr, Mg, and Ba, and, serving as a dopant, at least one species selected from among Ce, Na, Eu, Nd, Pr, Tm, Tb, and Er.

1 . A fluoride single-crystal material for use in a thermoluminescence dosimeter, characterized in that the material comprises a compound represented by LiXAlF 6 , wherein X is selected from the group consisting of Ca, Sr, Mg, and Ba, and, serving as a dopant, at least one species selected from among Ce, Na, Eu, Nd, Pr, Tm, Tb, and Er.  
   
   
       2 . A fluoride single-crystal material for use in a thermoluminescence dosimeter according to  claim 1 , wherein X predominantly comprises Ca which is partially substituted by Sr, and is represented by Ca p Sr q  (p+q=1, 0<q<1).  
   
   
       3 . A fluoride single-crystal material for use in a thermoluminescence dosimeter according to  claim 1 , wherein X predominantly comprises Y which is substituted by Z, and is represented by Y r Z s  (r+s=1, 0<s<0.2), Y being Ca or Sr, and Z being an element selected from the group consisting of Mg and Ba.  
   
   
       4 . A thermoluminescence dosimeter, characterized by comprising a thermoluminescence dosimeter element formed of a fluoride single-crystal material for use in a thermoluminescence dosimeter as recited in any of  claims 1  to  3 , and a holder for holding the thermoluminescence dosimeter element.